If unified national and international commitment could achieve monumental progress during crises like the world wars, a similar level of coordinated mobilization is required today. A wartime economic restructuring transitions society at emergency speed off fossil fuels through massive investments, just transition programs, and an enduring rationing of carbon pollution. Government mandates modernize infrastructure, transportation, manufacturing and agriculture along renewable lines while stimulating sustainable jobs and industries.
International cooperation leverages strengths and resources, from research collaborations to emissions pacts holding all nations accountable. Wealthy emitters aid economic transition of frontline nations suffering first from weather extremes. A progressive carbon fee program funds mitigation efforts while incentivizing structural economic changes. Grants assist vulnerable communities relocating from rising seas and intensifying natural disasters.
Prioritizing collectivity and justice transforms sacrifices into liberating progress for all humankind. With science as the commanding general, nonviolent civil disobedience compels stubborn political systems to catalyze transformations long stalled by obstructionism and misinformation. But societal will aligned behind solutions offers hope where bleakness once prevailed.
The problem being, of course, that conservatives and capitalism are ruining everything. Just look at how we fared at COVID. If we can't get the entire population to stay at home and wear masks to protect themselves against a global pandemic, how the heck are we supposed to get them to stay at home and wear masks to protect themselves against climate change?
You really aren't going to like how much fossil fuel is burned in an actual war...
OP is talking about how the mentality of war can be utilized against climate change, and you're just responding with irrelevant whataboutism